6．____________ full of energy；very active 7．____________ act of discovering；discovering or being discovered 8．____________ the action or power of attracting 9．____________ amount of money taken off the cost of sth. 10．____________ find the size，quantity，extent，degree，etc.of (sth.) 11．____________ measurement or extent from end to end

energetic

discovery

attraction　

discount　

measure　

length